What am I actually adjusting when I move around these three sliders in the "Adjust Color" setting?
In Preview, what properties are the top three level sliders
image editingimage processingpreview
Related Question
- Where’s the Edit Toolbar Button in Preview Application
- Preview – How to Edit Color of Selected Area
- Preview App – What Does the ‘Resample Image’ Option Do?
- Difference Between Millions and Billions in Printer/Scanner Colour Settings
- The purpose of an AAE file
- How to Select and Move Shapes in Preview
- Difference Between Export as PDF and Export > Format: PDF in Preview
Best Answer
The control is a histogram, also called "levels". When you adjust the sliders, you are adjusting the exposure of the image.
Photo editing technique is probably out of scope of Ask Different, but you can read more about it in Apple's documentation for Photos: https://support.apple.com/guide/photos/apply-levels-adjustments-pht362f9034f/6.0/mac/11.5